Globe relief-valve



(No Model.)

W. H. WHEELER.

GLOBE RELIEF VALVE.

No. 372,503. Patented Nov. 1, 1887.

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\VILLTAM H. WHEELER, OF ERIE, PENNSYLVANIA.

GLOBE RELIEF-VALVE.

SFECIPICATIO'N forming part of Letters Patent No. 372,503, dated Novenibei 1, 1887.

Application filed February 4,1887. Serial No. 226,588. (No model.)

To all whom it may concern:

Be it known that I, W ILLLIM IIWIIEELER,

- a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, haveinvented certain new and useful Improvements in Globe Relief-Valves; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawing, and to the letters of reference marked thereon, forming part of this specification.

My invention consists in the improvements in globe relief-valves hereinafter set. forth, and explained in the specification and claim, and illustrated in the accompanying drawing, in which the figure is a vertical central section of my improved globe relief-valve.

The objects of my improvement are to construct a globe-valve with spring mechanism operating upon the valve, so as to allow the valve to be raised from its seat when undue pressure is exerted upon it and automatically close it when such pressure is relieved, said spring mechanism being adapted to be adjusted so as to exert any desired pressure on the valve, so that whenever the pressure exceeds the pressure to which the spring is adjusted the same will open and remain open until such excess of pressure is relieved, the valve thus operating as a safety or relief valve, while at the same time it performs the functions of an ordinary globe-valve.

In the drawing 1 have shown an angle-valve embodying my improvement; but it is obvious that my improvement is adapted to be embodied in any of the ordinary forms of globe-valve with equal facility.

In the form of my improved valve shown A is the body of the valve, and B the inlet and O the outlet thereof. construct a valve-seat, D, so that the valve operating thereon will open upward therefrom. Opposite the valve-seat D, Iscrew the valve-stem case E into the valvebody A, the case E being bored out and provided with a In this body A, I

of equal size down to the point (7, below which the bore is reduced to fit the lower section, II, of the stem.

Upon the lower end of the section II, I

construct the valve G, adapted to operate on the valve-seat D. On the upper end of the stem H, I secure a head or collar, h, which fits loosely in the larger portion of the bore of the upper section, F, of the valvestem, and prevents the lower section, H, from being withdrawn therefrom. In the larger por tion of the bore, in the upper section of tie stem F, I place a spiral spring, I, which rests upon the head it of the lower section, H, and in the upper end of the bore of the section F, I cut a screw thread, 13, adapted to fit a screw-plug, J, which is screwed therein on the top of the spring I, so that the tension thereof may be regulated at pleasure.

On the upper end of the stem F, I secure an ordinary hand-wheel, K, by means whereof the valve is opened and closed in the usual manner.

It is obvious that the tension of the spring I may be adjusted to exert any desired pressure on the head hot the valve-stem H, and that whenever the pressure exerted on the Valve G is greater than the tension to which the spring is adjusted the valve G will be raised thereby from the seat D, and when such excess of pressure is relieved the valve G will automatically return to its seat, while at the same time the valve is adapted to be opened and closed by hand in the same man ner as in any ordinary globe-valve.

Having thus fully described my invention, so as to enable others to construct and use the same, what I claim as new, and desire to secure by Letters Patent of the United States, is-

In a globe relief-valve, the combination,

in the valve stem thereof, of a hollow upper section, having on the outside thereof a thread operating in the valve-body for raising and lowering the said hollow stem, with a smaller valve-stem attached to the valve spring, substantially as and for the purpose and telescoping into the, lower end of said set forth. 4 1o hollow stem, a head on said smaller stem to In testimony whereof I a'fifix my signature in prevent its being withdrawn from said holpresence of two witnesses.

5 low stem, a spiral spring in said hollow stem WILLIAM H. WHEELER.

operating on the head of the smaller stem, \Vitnesses: J and an adjusting-screw in the upper end of J. R DROZEsKI, I the hollow stein operating on the said spiral WM. P. HAYES. 

